Yes, it should have a small, about .02" chamfer. I did not include the feed ramps in the model as I was developing this from a .308 to use for a .300 WSM.This is a DPMS design that I checked on my CMM and reverse engineered into Pro/e.I did this because the lead time from DPMS was quoted at three months. I ended up getting it about the same time I got the piece of S7 to machine one though. I ended up making a couple for future use anyway.Might fool around and build a .45 acp barrel/bolt in the near future if I can work out a good mag well converter.